automatic assignment of "cover" at the 1st picture

[shyim]

Goal: Less mouse clicks when assigning 1st image at item detail.

Condition:
no image has been assigned to the item yet

Improvement:
the 1st image what is assigned, automatically also receives the assignment "cover" (the 1st image is usually the most important)

[aragon999]

I cannot reproduce this issue, when assigning an image to a product which had no assigned media before, the first image is made as cover, all additionally assigned images have a higher position and are not made as cover and are added at the last position.